Update dependencies from https://github.com/dotnet/arcade build 20190808.13 (#7371)

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19408.13

Author: dotnet-maestro[bot]

NuGet.config

@@ -22,8 +22,6 @@
     <add key="vs-impl" value="https://vside.myget.org/F/vs-impl/api/v3/index.json" />
     <add key="roslyn_concord" value="https://myget.org/F/roslyn_concord/api/v3/index.json" />
     <add key="devcore" value="https://vside.myget.org/F/devcore/api/v3/index.json" />
-
-    <!-- These keys can be removed once 16.3 has shipped, they are necessary to build with net16.3 previews -->
     <add key="dotnet-windowsdesktop" value="https://dotnetfeed.blob.core.windows.net/dotnet-windowsdesktop/index.json" />
     <add key="aspnet-aspnetcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore/index.json" />
     <add key="aspnet-aspnetcore-tooling" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore-tooling/index.json" />

eng/Version.Details.xml

@@ -3,9 +3,9 @@
   <ProductDependencies>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19407.9">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19408.13">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>77597ba7f484bef24368d966b7fe91fe38ec973b</Sha>
+      <Sha>524bb3e06ffd5b483a3c71a8f670b7a4bd2c232a</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

global.json

@@ -10,7 +10,7 @@
     }
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19407.9",
+    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19408.13",
     "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19069.2"
   }
 }